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SAE J3039_202505 : 2020 (2025)

Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss

Standard Details

This SAE Recommended Practice covers power transfer units (PTUs) used in passenger car and sport utility vehicles to support all wheel drive (AWD) operation. PTUs are typically full-time use geared devices (see 3.1 ). Some PTUs have additional features such as part-time on-demand capability via electronically actuated disconnect features, and other configurations are possible.

General Information

Status : Reaffirmed
Standard Type: Main
Document No: SAE J3039_202505 : 2020 (2025)
Document Year: 2020
Pages: 12

Life Cycle

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Reaffirmed
SAE J3039_202505 : 2020 (2025)
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